Thomas m. Virginia (I show Bradford - was there a prior marriage or is this an error?) Thomas Clifford Sr. b. 1896 married Margaret Martin Alfred Gaither Jr. b. 1863 married Louise Wright Alfred Gaither Sr. b. 1819 married Elizabeth Richardson
Alfred Gaither (1819) born in the District of Columbia was the son of Henry Chew Gaither b. 17 July 1792 who married Arianna Hughes on the 25 of Dec 1816. By the way Alfred is kind of a popular Gaither name
You will want to be careful when you hit the Henry Chew Gaithers as there are at least four of them I am aware of (I also have a couple of Gaither lines) and my guess is there may be at least a couple of more.
Henry Chew Gaither who was born in 1792 was the son of Daniel Gaither who married Henrietta Riggs. Daniel was born in 1765 in Newfoundland Hundred, Fredrick County, MD and died 16 Sep 1818 in Montgomery Co. Maryland.
The Gaithers are a fun family to follow in that they tended to leave lots of records - if not land records - court records. I don't know why, but they seem to have been a bit of a litigious family.
A bit of a tip - once you get to early D.C., some family records are actually found in Maryland - particularly Montgomery and Prince George's counties so if you have problems following the family within the federal district, check surrounding Maryland.
Many of the Gaither records can be found within the Maryland online archives and your D.C. and Ohio records might be found through FamilySearch.org. Register for familysearch - it's free and you will be able to view more actual records with a registration.